We have mice in garage, so set 2 traps and they were so light they kept eating the food and not setting off the trap, bought an electrocution trap and 100% every time and don`t have to keep replacing peanut butter!
When green light flashes it has made a kill. Open lid, tip out, close lid and switch on again for the next one, got 8 in 8 days. then nothing.
Alas then 2 in 5 mins! Hope thats the last as they chewed through spud sack and ate LOADS of spuds we grew >:(
They work by mouse wiggling in hols and around a few bits to metal plate, when they touch 2nd plate by food then zap, dead in a second.
Got them online Primrose London. 4 duracell kills 50.